telephone exchange
noun [ C ] uk/ˈtel.ɪ.fəʊn ɪksˌtʃeɪndʒ/ us/ˈtel.ə.foʊn ɪksˌtʃeɪndʒ/
电话交换局,电话交换台
the building that contains the equipment for connecting phone calls
See also: exchange noun
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